.box {
    width: 980px;
    height: 500px;
    position: relative;
    overflow: hidden;
    .container{
        width: 100%;
        height: 100%;
        white-space: nowrap;
        position: absolute;
        // left: 0;
        top: 0;
        transition: all .3s;
    }
    .step {
        width: 100%;
        height: 100%;
        display: inline-block;
        overflow: hidden;
        .my-form {
            width: 100%;
        }
    }
}